I don't think anyone here had the most accurate estimate of what was the cost of the lens for both Canon and Nikon, you would have to call the shop up and ask for quotation. Check the price guide section in this forum, there was a list of reputable shops that normally we would go to for camera accessories.
Also I would believe what you are looking at is a EF-S 18-200mm IS lens. This is a good travel lens. Quite sharp, but don't expect it to be 'L' lens quality. In fact many other lens such as the 15-85mm is sharper... but convenience wise, this is a great lens, especially when you don't want to keep changing lens.
look to this website for lens comparism,
http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=675
And also read up reviews in dpreview, cameralabs, etc for better understanding of cameras and lens.
Oh... and yes, D7000, 600D, 550D, A55 and A33 all have full HD recording capability.